the measure was introduced by california democrat dianne feinstein, who led the effort to pass the first ban in 1994. that legislation expired a decade later, and feinstein said it was past time to take action. >> we have done our best to craft a responsible bill to ban these assault weapons. guns that are designed for military use bought all over this country a oft usefor mass murder. >> sreenivasan: feinstein's proposal would ban the sale, transportation, importation or manufacturing of more than 150 specifically named firearms as well as certain semi-automatic rifles, handguns and shotguns; limit ammunition magazines to ten rounds; grandfather weapons legally owned on the date of enactment and, exempt over 900 weapons used for hunting or sporting activity. in response, the national rifle association released a statement that said, "the american people know gun bans do not work and we are confident congress will reject senator feinstein's wrong-headed approach." the effort faces long odds in the republican-controlled house, and in the senate, where some democrats do not support expande